[Octave-bug-tracker] [bug #32275] "surf" function incorrectly handles NaN in colour data

[Ben Abbott]

Update of bug #32275 (project octave):

                  Status:                    None => Confirmed              
                 Release:                   3.2.3 => dev                    

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Follow-up Comment #5:

I compared Matlab to Octave without NaNs, and they behave consistently.

When the FaceColor = 'flat' the LL corner color is used. So I think Matlab is
doing the right thing. I don't see how to fix the Gnuplot result without
changing Gnuplot itself.

In any event, the FLTK tookit is also doing the wrong thing (NaN = black).

I suggest we fix the fltk toolkit (gl-render.cc ?) and leave gnuplot as it is.


I'm not familiar with this code, so I've cc'd Michael Goffioul.

Michael, can you look at this or give us some pointers?

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